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Fix Windows Security Access Denied When Opening Settings - Error 0x800704ec Windows Defender Troubleshooting-Teams Mic Not Working After Update: Troubleshooting Guide

2026-06-13 15:09:54developer-tools
Fix Windows Security Access Denied When Opening Settings - Error 0x800704ec Windows Defender Troubleshooting-Teams Mic Not Working After Update: Troubleshooting Guide

Final checklist

  • Confirm that the same symptom is gone after a restart or refresh.
  • Keep the smallest working change and undo temporary diagnostic settings.